JOHN D. HARDING M.D.
NPI 1144218835
Internal Medicine - Clinical Cardiac Electrophysiology in Doylestown, PA

Q: What is John Harding's NPI number?

The NPI number for John Harding is 1144218835. It was assigned to this individual provider in the NPPES registry on October 7, 2005.

Q: What is John Harding's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical Cardiac Electrophysiology, with taxonomy code 207RC0001X.

Q: When was this NPI record last updated?

The NPPES record for John Harding was last updated on March 3, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 07, 2005PECOS EnrolledAccepts Medicare Assignment

599 W STATE ST, SUITE 200, DOYLESTOWN, PA 18901(267) 893-6800(267) 893-6820 Get Directions Write a Review

NPPES record last updated: March 3, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About John D. Harding M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN D. HARDING M.D. (NPI 1144218835) is an individual clinical cardiac electrophysiology provider in Doylestown, Pennsylvania, licensed in Pennsylvania (MD421490) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with St Lukes Quakertown Hospital, and is a graduate of Temple University School Of Medicine (2000).

NPPES Registry Identity

NPI1144218835

Entity TypeIndividualMale

Primary Taxonomy207RC0001X

Provider Legal NameJOHN D. HARDINGCredential: M.D.

Location Address599 W STATE ST, SUITE 200Doylestown, PA 18901-2567

Mailing AddressPo Box 829641Philadelphia, PA 19182-9641 · (267) 370-5296 · Fax (215) 230-3725

Phone(267) 893-6800

Fax(267) 893-6820

Sole ProprietorNo

Medical School CMSTemple University School Of MedicineGraduated 2000

Enumeration DateOctober 7, 2005

Last NPPES UpdateMarch 3, 2023

NPPES CertifiedMarch 3, 2023

✔ NPI 1144218835 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Clinical Cardiac ElectrophysiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RC0001X

License✔ Licensed in PA · MD421490

Definition

A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them.

Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License MD421490 (PA)

599 W STATE ST, Doylestown, PA 18901

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Other Identifiers 1

Medicaid10823850003PA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

John D. Harding M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2961439815

PECOS Enrollment IDI20050721000750

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show John Harding reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Via Affiliates

0.1 mi

Anatomic Pathology & Clinical Pathology

595 W STATE ST
Doylestown, PA 18901

Reassigned Medicare billing, Pennsylvania enrollment
268 clinicians in this Medicare group

NPI 1194557637 (215) 345-2625

Clinical Specialty Associates

0.2 mi

Obstetrics & Gynecology

102 PROGRESS DR STE 202
Doylestown, PA 18901

Reassigned Medicare billing, Pennsylvania enrollment
192 clinicians in this Medicare group

NPI 1306734934 (215) 230-5296

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 29

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

782 services606 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

563 services411 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

387 services285 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

158 services157 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days 93296

This procedure involves remotely monitoring your pacemaker or implantable defibrillator system. Over a 90-day period, we check the device's performance and your heart's activity. This helps ensure the device is functioning properly and providing the best possible support for your heart health.

117 services61 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

83 services76 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days 93294

This procedure evaluates your pacemaker system remotely for up to 90 days. It checks whether single, dual, multiple lead, or leadless pacemakers are working properly. It's a safe, convenient way to ensure your heart device is functioning optimally.

74 services37 patients

Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation 93656

This is a procedure to treat atrial fibrillation, a condition causing irregular heartbeats. It involves a detailed heart evaluation using electrophysiology. A catheter is then used to destroy the problematic area causing the issue. Specifically, isolation of the pulmonary vein is done to regulate the heartbeat.

72 services70 patients

Destruction of tissue of upper heart chamber through tube to treat abnormal heart rhythm 93657

This procedure involves using a tube, or catheter, to access your upper heart chamber. Special tools are then used to destroy a small area of heart tissue causing abnormal rhythm. This helps reset your heart's regular rhythm, improving heart function.

62 services61 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

52 services43 patients

Evaluation of cardiac rhythm monitor system, remote up to 30 days 93298

This procedure involves remotely monitoring your heart rhythm for up to 30 days. A small device will record your heart's activity, which can be accessed by your healthcare team. This aids in diagnosing any irregularities or issues with your heart function.

49 services21 patients

Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days 93295

This procedure involves remotely monitoring your implantable defibrillator system, which can have single, dual, or multiple leads. Over a period of up to 90 days, the system's performance is evaluated to ensure it's working properly and providing the necessary heart rhythm support.

48 services27 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

46 services46 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

42 services33 patients

Heart rhythm recording continous external ekg over more than 48 hours up to 7 days 93242

This procedure involves wearing a device, an external EKG, for up to 7 days to continuously monitor your heart rhythm. It helps detect irregularities that may not occur during a standard EKG. The device is non-invasive and safe.

39 services38 patients

Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days 93244

A heart rhythm review involves monitoring your heart's electrical activity for more than 48 hours up to 7 days. Using a device called an external EKG, doctors can track your heartbeats to detect irregularities and help diagnose heart conditions.

39 services38 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

30 services30 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

24 services22 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

22 services22 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

22 services22 patients

Programming of dual lead pacemaker system 93280

Programming of a dual lead pacemaker system is a procedure to adjust your heart's pacemaker settings. This process involves a small device, called a programmer, that communicates with your pacemaker to ensure it's working optimally for your heart's needs.

18 services16 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

18 services18 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

17 services17 patients

Hospital discharge day management, 30 minutes or less 99238

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

16 services16 patients

Insertion of pacemaker and upper and lower heart chamber electrode 33208

A pacemaker insertion is a procedure where a small device, called a pacemaker, is implanted under your skin. This device uses electrical pulses to prompt the heart to beat at a normal rate. Electrodes are placed in the upper and lower chambers of your heart to help regulate your heartbeat.

15 services15 patients

Evaluation of implantable heart and blood vessel monitoring system 93290

An evaluation of an implantable heart and blood vessel monitoring system involves checking the device that's placed inside your body to monitor your heart and blood vessels' health. It helps doctors track your heart rate, rhythm, and blood flow, aiding in prompt, accurate treatment.

15 services13 patients

Insertion of catheters and destruction of tissue to treat abnormal heart rhythm 93655

This procedure involves placing small tubes (catheters) into your heart via a blood vessel. These catheters emit energy that corrects irregular heartbeats by eliminating the problematic heart tissue. It's a common, minimally invasive method to treat abnormal heart rhythms.

15 services14 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

13 services13 patients

Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days 93297

This service involves remotely monitoring your heart and blood vessel implant system for up to 30 days. Using advanced technology, healthcare professionals can track the device's performance and your health status, ensuring the system is working optimally for your needs.

12 services11 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Lukes Quakertown Hospital

Acute Care Hospitals · Quakertown, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390035

Location3000 St. Luke's DriveQuakertown, PA 18951 · Bucks County

Emergency services Birthing friendly

Holy Redeemer Hospital And Medical Center

Acute Care Hospitals · Meadowbrook, PA

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number390097

Location1648 Huntingdon PikeMeadowbrook, PA 19046 · Montgomery County

Emergency services Birthing friendly

Hospital Of Univ Of Pennsylvania

Acute Care Hospitals · Philadelphia, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390111

Location34th & Spruce StsPhiladelphia, PA 19104 · Philadelphia County

Emergency services Birthing friendly

Doylestown Hospital

Acute Care Hospitals · Doylestown, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390203

Location595 West State StDoylestown, PA 18901 · Bucks County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 18901 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$137.17 typical visit price

range $59.88 – $180.99

Typical copayment $34.29 (range $14.97 – $45.24)

Most-billed visit code 99204

Established Patient

$105.21 typical visit price

range $19.30 – $147.29

Typical copayment $26.30 (range $4.82 – $36.82)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. KAMELA L ROTH PAC

Physician Assistant (Surgical)

599 W STATE ST, SUITE 301
DOYLESTOWN, PA 18901

Bucks County (215) 489-2066

DOYLESTOWN INFECTIOUS DISEASE ASSOCIATES, LLC

Internal Medicine (Infectious Disease)

599 W STATE ST, SUITE 215
DOYLESTOWN, PA 18901

Bucks County (267) 880-6975

CENTRAL BUCKS SPECIALISTS

Internal Medicine (Cardiovascular Disease)

599 W STATE ST, SUITE 200
DOYLESTOWN, PA 18901

Bucks County (215) 345-6050

MR. FRANCIS GRZYWACZ M.D.

Internal Medicine (Cardiovascular Disease)

599 W STATE ST, SUITE 200
DOYLESTOWN, PA 18901

Bucks County (267) 893-6800

DANIEL LIN M.D.

Specialist

599 W STATE ST, SUITE 100
DOYLESTOWN, PA 18901

Bucks County (215) 348-8020

KIMBERLY ANN BRUZAS M.S.

Audiologist

599 W STATE ST, THE PAVILION, SUITE 201
DOYLESTOWN, PA 18901

Bucks County (215) 345-7111

INFECTIOUS DISEASE SPECIALISTS, LLP

Internal Medicine (Infectious Disease)

599 W STATE ST, SUITE 215
DOYLESTOWN, PA 18901

Bucks County (267) 880-6975

DR. RICHARD A KONDAN DO

Internal Medicine

599 W STATE ST, STE 203
DOYLESTOWN, PA 18901

Bucks County (215) 348-9711

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Harding's NPI number?

The NPI number for John Harding is 1144218835. It was assigned to this individual provider in the NPPES registry on October 7, 2005.

Where is John Harding located?

John Harding practices at 599 W State St Suite 200, Doylestown, PA 18901. The listed phone number is (267) 893-6800.

What is John Harding's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical Cardiac Electrophysiology, with taxonomy code 207RC0001X.

Is John Harding enrolled in Medicare?

Yes. John Harding is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for John Harding's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Harding reassigns Medicare benefits to 2 organizations: Via Affiliates (Doylestown, PA) and Clinical Specialty Associates (Doylestown, PA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Harding's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is John Harding affiliated with any hospitals?

According to CMS data, John Harding is affiliated with St Lukes Quakertown Hospital, Holy Redeemer Hospital And Medical Center, Hospital Of Univ Of Pennsylvania and Doylestown Hospital.

When was this NPI record last updated?

The NPPES record for John Harding was last updated on March 3, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.